fbi agents traced them to paula broad well's computer. they also uncovered a series of intimate e-mails between broad well and petraeus. petraeus resigned from the cia on friday and admitted to an affair on broad well. broad well was writing a biography about the general. >> i hate to accept it, but there are a number of things one has to consider. first was there any kind of national security breech. to date there was not. >> petraeus apparently started the affair when leaving the army in 2011. it also appears he was the one who ended their romance. >>> today all over the country people stopped to pay tribute to those who have paid and are paying their time in the armed forces to protect our freedom. >> reporter: the day began with tradition. president obama laid a wreath at the tomb of the unknown at arlington national cemetery. the president said veterans day is special and significant. >> each year on the 11th day of the 11th month we pause as a nation and as a people. it is to pay tribute to you, to thank you. to honor you. >> report